<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>注册</title>
</head>
<body>
  <h1>注册</h1>
  <form method="POST" action="/reg">
    用户：<input type="text" name="username"></input> <br>
    密码：<input type="password" name="password"></input> <br>
    <button type="submit">注册</button>
  </form>
</body>
</html>